Introduction of Long Yan:Longan Aril or Arillus Longan.

TCM Herbalism:Medicinals and Classifications. ✵The article gives records of the herb Longan Aril, its English name, Latin name, property and flavor, its botanical source one plant species, ①.Dimocarpus longan Lour., with a detailed introduction to the botanical features of this plant species, the growth characteristics, and ecological environment of this plant species, the features of the herb Longan Aril, its pharmacological actions, medicinal efficacy, and administration guide.

Arillus Longan(Longan Aril).

Arillus Longan:herb photo Pin Yin Name: Lónɡ Yǎn Ròu.
 English Name: Longan Aril.
 Latin Name: Arillus Longan.
 Property and flavor: warm in nature, tastes sweet.

 Brief introduction: The Herb Arillus Longan is the dried aril of dimocarpus longan Lour., used to nourish the blood and induce tranquilization for the treatment of palpitation, dizziness and insomnia. The herb is commonly known as Arillus Longan, Longan Aril, Lónɡ Yǎn Ròu.

 Dimocarpus longan Lour:fruiting tree Botanical source: Common herbal classics and other famous herbal classics defined the herb Arillus Longan (Longan Aril) as the dried aril of the plant species (1).dimocarpus longan Lour. It is a plant of the Dimocarpus genus, the Sapindaceae Juss family (soapberry family) of the Sapindales order. This commonly used species is introduced:

(1).Dimocarpus longan Lour.

 Botanical description: The tree is commonly known as Lónɡ Yǎn. The fruit Longan is normally called "GuiYuan", is a subtropical luxury specialty, the history of the South "longan" and North "Ginseng,". Longan fruit is rich in nutrients, loved by the people since ancient times, but as a valuable tonic, its nourishing function is obvious.

 Environment is critical to the production of longan, longan can grow only in limited space in the world, usually in subtropical, temperate climates without severe frost partial areas. Therefore, longan has always been known as Lingnan good fruit, but also for its medicinal either eaten fresh on the market demand.

 Dimocarpus longan Lour:fruiting tree Longan fruit is a specialty of southern China, with a cultivation history over 2,000 years. Fruit shape is rounded, spherical shell with meat such as projectile size, meat-containing pulp. Pulp is white when fresh, full of water, taste as sweet as honey. Once dried it becomes dark green, quality, flexibility, called longan.

 Longan, longan scientific name for fruit cultivation in southern China, prolific in the Zhujiang river regions. In litchi, banana, pineapple fruit with Jane four southern China. It's height also long and slightly smaller, white flowers, into a reality in early autumn. Its fruits turns earth and fall, shape round, such as projectile was slightly less than the lychee, green-brown skin. Peel the crystal-clear partial white, red and black music visible flesh stone, mimicking eyes, so to "longan" name it.

 Dimocarpus longan Lour:fruiting tree Dried longan is welcomed by consumers as nutritional supplements, in various parts of China it has a big consumer market. Longan fruit contains water, which is an indispensable condition for microbial growth and reproduction. In the absence of moisture conditions, microbial growth and reproduction is inhibited. Longan fruit contains 50% to 70% water, but also contains nutrients, such as sugars, proteins, vitamins, etc., which is high quality natural microbial culture. Longan dry roasted, is the use of thermal effects will reduce the moisture in the fruit to a certain extent, so the concentration of soluble substances increased to the extent of microbial difficult to use. The thermal effect of the dry longan reduce the moisture content, the enzyme activity is also inhibited so that it can be saved for a long time.

 Logan fruit Dried longan particles appearance is round, uniform size, shell yellow, the outer is slightly powdery. Shell is hard and brittle, friable pinching, biting with teeth the kernel is fragile and there is a noise, thick, meaty and brown spots transparent, pulp surface is with a layer of fine wrinkles, a circle of red stalk portion. Meathead and putamen sticky, slightly sticky touch pulp, pulp and kernel are easy to peel. Sweet with the fragrance, nothing to eat a hard time feeling less residue after chewing, pulp moisture content is 15 to 19%; dried longan in the south, but more for water to drink, or with jujube, lotus and other soup.

 Ecological Environment: The tree prefers warm and humid. It is widely cultivated from the southwest to the southeast of China, most abundant in Taiwan, followed by Guangdong, south of Guangxi, and Yunnan, mainly on the river banks and gardens.

 Growth characteristics: Longan is a subtropical fruit tree, it prefers high temperature and humidity. Temperature is the main factor affecting its growth and fruiting. Generally, it can grow well in places where the average annual temperature exceeds 20 °C (Celsius, or 68 degrees Fahrenheit). It is resistant to drought, acid, poor soil, avoid leaching, it grows well in red soil hilly land, dry land, easy cultivation, long life, high yield.

 Longan Aril:herb photoLongan aril and logan kernel:natural color of logan aril Characters of herbs: The aril is an irregular piece, often bonded into a ball, the length is 1~1.5 cm, the width is 1~3.85 cm, the thickness is about 1 mm. Yellow-brown to brown, translucent. The outer surface is uneven with shrinkage; The inner surface is bright with fine longitudinal wrinkles. The texture of the herb is soft and moist, sticky. The herb has a slight fragrance, it tastes very sweet. The herb of better grade has large and thick slices, yellow-brown, translucent, and a thick sweet taste.

 Pharmacological actions: ①.inhibitory effect on Microsporum Odouin in test tube; ②.sedative and stomach-strengthening effect; ③.inhibitory effect on Shigella dysenteriae (Bacillus dysenteriae).

 Medicinal efficacy: Invigorating heart and spleen, nourish Qi and blood, nourishing blood and calm the nerves (nourishing the blood and tranquilization). It is indicated for deficiency of Qi and blood, palpitate with fear, palpitate with fear due to deficiency of Qi and blood, palpitation and severe palpitation, insufficiency of heart and spleen (deficiency of both heart and spleen), consumptive disease and emaciation weakness, amnesia(poor memory), insomnia (lose sleep), blood deficiency and sallow complexion (deficiency of blood, looks yellowing), menoxenia (irregular menstruation), metrorrhagia and metrostaxis (uterine bleeding), etc.

 Administration of Arillus Longan (Lónɡ Yǎn Ròu): 
Reference: Administration Guide of Arillus Longan (Lónɡ Yǎn Ròu)
TCM Books: ①.Internally:9~15 grams; ②.Internally:water decoction, 2~5 qian (about 6~15 grams);prepare ointment, infusing in wine, or prepare to pill, powder; ③.Internally:water decoction,10~15 grams, big dosage could be 30~60 grams;prepare ointment, infusing in wine, or prepare to pill, powder.

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